Could someone take a picture of the CTS on the 4g15. So we all know which sensor we are talking about?
I'm not sure which one it is, is why i'm asking.
Or i would take a picture my self.
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| Cold start wont start until few attempts then idle surges up http://4g61t.org/forum/viewtopic.php?f=17&t=35924 |
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| Author: | boughart22 [ Fri Jan 27, 2012 12:20 pm ] |
| Post subject: | Cold start wont start until few attempts then idle surges up |
I just bought a 1992 Colt. I have 2 problems: 1. It wont start right away. I have to crank it, turn the ignition off completely and try multiple times until it starts. #2. Once it starts, the idle surges up then it goes up and down. I will upload a video soon. Im a newbie and please bare with me. I have been in search for an IAC valve that doesn't cost an arm and elbow but to no luck.. I am also in need of an ECU to try. Please help. |
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| Author: | Peppi_C50 [ Fri Jan 27, 2012 1:30 pm ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
What engine? |
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| Author: | boughart22 [ Fri Jan 27, 2012 8:51 pm ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
4g15. No check engine light at all to begin with. Just an update, Now I totally disconnected the IAC valve, The car starts right up, idles straight with A/C and load. I drove it around the block but of course just I expected the check engine light came on. Unfortunately, I tried to hook the IAC valve again, my original problems came right back. |
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| Author: | boughart22 [ Fri Feb 03, 2012 8:50 pm ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
i replaced the fuel pump and regulator. no changes. it cranks but takes 5x for it to start. now waiting for iac and ecu from cuda68. any suggestions? Pls help. thnx. |
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| Author: | Flying Eagle [ Fri Feb 03, 2012 10:39 pm ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
What type of spark plugs are in there? Fuel filter been changed recently? What is the code that comes up for the CEL? ( search the archives to find how to pull the codes or visit lilevo.com ). Also try www.lilevo.com/mirage/ for any service manuals you may need. What is your base timing set at? |
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| Author: | 89Mirageman [ Fri Feb 03, 2012 11:19 pm ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
The temp sensor can cause a weird cold start issue too. Not saying its your problem but worth a try, the sensor is only $15 or so from Rockauto. Be sure to replace the one that goes to the ecu though, not the one for the gauge or the fans. |
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| Author: | Mechacode [ Sat Feb 04, 2012 2:48 am ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
Definitely check the CTS. If it went bad, that'd cause a super rich condition and the IAC would close up to create an even richer condition, unplugging it would pop it open causing more air to go in with the extra gas creating a decent enough mixture to let it run. |
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| Author: | 89Mirageman [ Sat Feb 04, 2012 9:15 am ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
Also unplugging any sensors will throw the ecu into limp mode where it runs on generic settings. |
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| Author: | boughart22 [ Sat Feb 04, 2012 4:13 pm ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
Ill work on those suggestions this Monday along with the parts im waiting for. I will get a Water temp sensor and check the spark plugs. Im thinking thats not all the problem. When it runs with the IAC eliminated (removed) it runs fine. It drives me nuts that I have to crank it many times before it runs. I have changed the fuel pump, filter, and regulator. I need to not spend money too much on the 4g15 so I can save for a 4g63 swap but if this doesnt do well, I will end up giving up on this project car. Im really frustrated. Anybody up here in NW IL? near 6 flags. |
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| Author: | Mirage90 [ Sat Feb 04, 2012 4:31 pm ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
Quote: Ill work on those suggestions this Monday along with the parts im waiting for. I will get a Water temp sensor and check the spark plugs. Im thinking thats not all the problem. When it runs with the IAC eliminated (removed) it runs fine. It drives me nuts that I have to crank it many times before it runs. I have changed the fuel pump, filter, and regulator. I need to not spend money too much on the 4g15 so I can save for a 4g63 swap but if this doesnt do well, I will end up giving up on this project car. Im really frustrated. Anybody up here in NW IL? near 6 flags.
When you can pin point the direct problem. Please message me. I am having the same problem. |
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| Author: | Mechacode [ Sat Feb 04, 2012 5:54 pm ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
Quote: Im thinking thats not all the problem. When it runs with the IAC eliminated (removed) it runs fine.
Read my post again, it explains your problem. |
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| Author: | Mirage90 [ Sat Feb 04, 2012 6:57 pm ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
Could someone take a picture of the CTS on the 4g15. So we all know which sensor we are talking about? I'm not sure which one it is, is why i'm asking. Or i would take a picture my self.
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| Author: | Cuda-68 [ Sun Feb 05, 2012 12:00 am ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
The temperature sensor for the ecu is the front one which is two prong, rear one is one prong for the gauge (someone correct me if I'm wrong).   
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| Author: | Mirage90 [ Sun Feb 05, 2012 12:02 am ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
What about he IAC sensor? Can we get a pic of it? |
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| Author: | Cuda-68 [ Sun Feb 05, 2012 12:12 am ] |
| Post subject: | Re: Cold start wont start until few attempts then idle surge |
IAC motor? 
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